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Finding the Fourth Proportional to 543,722.40, 815,583.60 and 393,645.60

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Solution

The fourth proportional to 543,722.40, 815,583.60 and 393,645.60 is: 590,468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,722.40 : 815,583.60 = 393,645.60 : x
  2. Step 2: Convert to fraction form
    543,722.40/815,583.60 = 393,645.60/x
  3. Step 3: Cross multiply
    543,722.40x = 815,583.60 × 393,645.60
  4. Step 4: Simplify right side
    543,722.40x = 321,050,895,572.16
  5. Step 5: Solve for x
    x = 321,050,895,572.16/543,722.40
  6. Step 6: Final answer
    x = 590,468.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.